Add new button same as "Add to Cart" by setting the product price as 0 on product detail page

Technical Q&A

Topic summary

A developer wants to add a second button on the product detail page that functions like “Add to Cart” but sets the product price to 0, intended for free order samples. They’re seeking help customizing this button using cart/add.js.

Current Status:

  • One responder confirmed this is achievable using custom Liquid code
  • The original poster requested specific code examples and implementation guidance
  • Another user expressed interest in the same functionality
  • No concrete solution or code has been provided yet

The discussion remains open with the technical implementation details still pending.

Summarized with AI on October 24. AI used: claude-sonnet-4-5-20250929.
1

I am going to implement the new feature.

I want to add the new button on product detail page same as “Add To Cart” button by setting the product price as 0.

It’s for free order sample.
I want to customize that button with cart/add.js.

Could you please help me?

Thank you.

2

Hello @TarasDiakiv

This can be done by the with the liquid code with the custom.

3

Thanks for your response.
Could you please provide custom code and where I should add them?

4

this problem solve, i need same button in my store